GENERAL TERMS AND CONDITIONS

Introduction

These General Terms and Conditions (the “GTC”) apply to legal relationships between BST Solar Kft. (“BST Solar” or the “Seller/Supplier”) and its business partners (the “Buyer” or “Customer”) for the sale of products and for engineering, installation and commissioning services. The GTC also cover the use of Accounts created on www.bst.solar, orders placed in the webshop, and the Remote Monitoring service.

1. The Seller

• Company name: BST Solar Kft.
• Registered office: Rokolya utca 1-13., 1131 Budapest, Hungary
• Company registration number: 01-09-437175
• Tax number: 32682861-2-41; EU VAT number: HU32682861
• Represented by: Josip Kovács, Managing Director
• E-mail: info@bst.solar; webshop and order matters: sales@bst.solar
• Website: www.bst.solar

2. Definitions

• “Product”: energy equipment, component or device (PV, BESS, control technology) sold by BST Solar.
• “Service”: engineering, design, configuration, installation, commissioning, maintenance or consulting activity provided by BST Solar, including the Remote Monitoring service.
• “Offer”: a document issued by BST Solar containing prices and terms, which does not in itself create a contract.
• “Proforma Invoice” (PI): a document issued by BST Solar upon whose acceptance by the Customer, or upon (partial) payment of the amount stated in it, a contract is concluded between the Parties.
• “Individual Contract”: a separately negotiated, stand-alone written contract concluded between the Parties for Services.
• “Parties”: BST Solar and the Customer together.

Further definitions:

• “Account”: personal user access created by registration on www.bst.solar and protected by e-mail address and password. The same Account is used for the webshop and the Portal.
• “Registered User” (level 1): a natural person who has created an Account for themselves or on behalf of an organisation and has confirmed their e-mail address.
• “Approved Customer” (level 2): a company or other organisation whose application for customer status BST Solar has approved under Chapter 3; it may order in the webshop.
• “Monitored Customer” (level 3): an Approved Customer that has concluded a Remote Monitoring contract with BST Solar and at whose Site the Gateway has been installed.
• “Remote Monitoring service”: the monthly-fee service described in Chapter 12 (data collection, display, alerts, remote diagnostics).
• “Portal”: the web interface operated by BST Solar (currently portal.bst.solar) on which the Monitored Customer views the data of its Site.
• “Site”: the power plant, energy storage system or facility to which the Remote Monitoring service relates.
• “Gateway”: the communication device installed at the Site (currently a Teltonika router with SIM card) which transmits the Site’s data to the Portal; it is the property of BST Solar.
• “Aggregator”: a third party (e.g. balancing service provider, energy trader) that issues instructions controlling the Site’s generation or consumption on behalf of the Customer.

3. Account and registration

3.1. Registration (level 1). Anyone – a natural person or a representative of an organisation – may create an Account on the website. The registrant must provide true, accurate and up-to-date data. The Account becomes active upon confirmation of the e-mail address. Registration requires acceptance of these GTC and a declaration of having read the Privacy Notice.

3.2. Rights of Registered Users. A Registered User may download the technical documentation available on the website (e.g. datasheets, manuals). They cannot place orders, and the webshop order prices (including individual prices) are not visible to them; they can see the indicative list prices published on the website. Creating an Account does not create any obligation for BST Solar to conclude a contract.

3.3. Applying for customer status (level 2). Customer status may only be requested on behalf of a company or another organisation with a tax number (B2B), using the form submitted from the Account (KYC form). Mandatory data: company name, tax number and – for companies in the EU – EU VAT number, registered office, company registration number or equivalent registry number, name of the representative, contact person and billing address. The applicant declares that they are authorised to act on behalf of the organisation.

3.4. Approval. BST Solar reviews the application manually and may request further data or evidence (e.g. a company extract). BST Solar may reject the application without giving reasons. The applicant is notified of the decision by e-mail. Upon approval, the organisation’s data are recorded as a partner in BST Solar’s business management system.

3.5. Personal nature of the Account. The Account is personal, non-transferable and may not be shared. If several employees of an organisation use the services, each creates their own Account. Statements made through the Account (e.g. orders) bind the organisation assigned to the Account.

3.6. Suspension and revocation. BST Solar may suspend, restrict or revoke the Account or the customer status, in particular in the case of false data, late payment, breach of Chapter 14 (Security rules) or a security risk. It is not obliged to give reasons; contracts already concluded are not affected by the suspension.

3.7. Downloaded documents. Documentation downloadable from the Account is the intellectual property of BST Solar or the manufacturer. It may be used only for the user’s own projects related to BST Solar; it may be passed on to third parties, published or distributed in modified form only with BST Solar’s prior written consent.

4. Scope and conclusion of contract

4.1. These GTC apply to all Offers, Proforma Invoices, order confirmations and webshop orders of BST Solar and – unless otherwise agreed – to Individual Contracts, supplementing but not replacing the express provisions of the Individual Contract.

4.2. Where only Products are sold between the Parties, acceptance of the Offer does not in itself create a contract; the contract is concluded upon the Customer’s express acceptance or upon (partial) payment of the amount stated in the Proforma Invoice. If the Parties do not conclude a separate written contract for the transaction, the accepted Proforma Invoice and these GTC together constitute the sales contract between the Parties.

4.3. Webshop orders. Only Approved Customers may place orders in the webshop. To place an order, the Customer must accept these GTC by ticking a separate checkbox at checkout. An order placed in the webshop is the Customer’s offer (to conclude a sales or service contract). The automatic e-mail confirming receipt of the order only confirms receipt and does not constitute acceptance of the offer.

4.4. BST Solar issues a Proforma Invoice on the basis of the order, or rejects the order without giving reasons. The contract is concluded upon issue of the Proforma Invoice and receipt of the amount stated in it within the deadline, in accordance with Section 4.2. The contract qualifies as a contract concluded in writing; its language is Hungarian (English for foreign Customers), and BST Solar files orders electronically. BST Solar sends the Proforma Invoice or the rejection within 5 business days of receipt of the order; otherwise the Customer is released from its offer. Before submitting the order, the Customer can check and correct the data entered on the checkout summary page (Sections 5–6 of Hungarian Act CVIII of 2001 on Electronic Commerce).

4.5. Where the relationship also covers the provision of Services, the Parties always conclude a separate Individual Contract setting out the exact scope, fees and deadlines of the Service. In that case, these GTC apply on a supplementary basis to matters not expressly regulated in the Individual Contract; in case of conflict, the Individual Contract prevails. Exception: for services with fixed content ordered in the webshop (e.g. the Remote Monitoring service), these GTC and the product description apply, even without a separate Individual Contract.

4.6. The Customer’s general terms and conditions, purchasing conditions or other unilaterally referenced terms do not become part of the contract – unless expressly agreed in writing – even if BST Solar does not expressly object to them.

4.7. If the Customer withdraws from or rescinds the contract after its conclusion, it must compensate BST Solar for the resulting damage. Where BST Solar has already ordered the Product from its own supplier, the Customer may not withdraw from the contract in respect of that Product. If the Customer fails to take delivery of the Product, BST Solar may exercise the rights set out in Section 6.4.

5. Prices and payment terms

5.1. Prices in Offers issued by BST Solar are valid for 15 days from the date of issue, unless otherwise stated. Prices are net prices in the currency specified in the Offer/Proforma Invoice (typically EUR or HUF) and do not include VAT, where applicable.

5.2. Webshop prices. Indicative list prices of certain Products may also be published on the website (e.g. BST Control Box). Prices for ordering in the webshop, including individual and discounted prices, are visible only to Approved Customers. Webshop prices are net prices for both domestic and foreign Customers, in the currency indicated for the product. The price shown in the webshop on the date of the order applies. In the case of an obvious pricing error (e.g. a typo), BST Solar is not obliged to fulfil the order and notifies the Customer without delay.

5.3. VAT. BST Solar determines VAT on the basis of the Customer’s registered office and tax number: for domestic Customers, the applicable Hungarian VAT rate (currently 27%); for EU Customers with a valid EU VAT number, a VAT-exempt intra-Community supply or reverse charge; for Customers outside the EU, a VAT-exempt export, provided the legal conditions are met. The Customer must provide the necessary data truthfully; BST Solar verifies EU VAT numbers in the VIES system.

5.4. Unless otherwise agreed, payment is made by bank transfer within the payment term stated on the Proforma Invoice/invoice. The date of payment is the date on which the full amount is credited to BST Solar’s bank account. In the webshop, only bank transfer is available; unless otherwise indicated, the payment term of the Proforma Invoice is 8 days from issue.

5.5. Non-payment. If the amount of the Proforma Invoice is not received within the payment term, the contract is not concluded and the order is cancelled; BST Solar notifies the Customer by e-mail. In the case of partial payment, BST Solar refunds the amount paid within 30 days, unless the Parties agree otherwise.

5.6. In the event of late payment by the Customer, BST Solar is entitled to default interest under the Hungarian Civil Code and – in business-to-business relationships – to the statutory minimum flat-rate recovery cost under Section 6:155 of the Civil Code, and also to reimbursement of its further documented costs.

5.7. BST Solar may suspend performance (delivery, installation, commissioning, Remote Monitoring service) if the Customer fails to meet a due payment obligation on time. BST Solar is not liable for any delay or damage resulting from the suspension.

5.8. For transactions subject to reverse charge, the Parties must act in accordance with the applicable VAT rules (Section 142 of the Hungarian VAT Act), and the Customer must provide BST Solar with the necessary declaration.

5.9. BST Solar may assess the Customer’s financial situation and ability to pay as part of a risk analysis. If BST Solar considers that the Customer’s financial risk justifies it, it may make the conclusion, entry into force or continued performance of the contract conditional upon security (in particular an advance payment, bank guarantee, cash deposit, joint and several guarantee or direct debit mandate). The type and amount of the security are agreed individually between BST Solar and the Customer; BST Solar decides at its own discretion whether security is required.

6. Delivery and installation

6.1. Unless expressly agreed otherwise in writing, delivery/installation deadlines are indicative and may change depending on manufacturer and supplier capacity and on force majeure events, for which BST Solar accepts no liability. The delivery time stated in the webshop runs from receipt of payment and is indicative.

6.2. Delivery is made under the Incoterms rule stated in the Offer/Proforma Invoice (typically DAP). Risk in the Product passes to the Customer at the point defined by the applicable Incoterms rule. For webshop orders: within Hungary DAP (delivery address given by the Customer); within the EU according to BST Solar’s separate shipping quote; the Parties may also agree on collection from BST Solar’s premises (EXW).

6.3. Partial deliveries are permitted unless otherwise agreed.

6.4. If, after the delivery deadline, the Customer fails to take delivery of the Product within 5 business days despite a request to do so, BST Solar may invoice the price of the Product immediately. BST Solar may also invoice the Customer for storage costs incurred until late acceptance; unless otherwise agreed, these amount to 0.15% of the Product’s sale price per day from the date of default.

6.5. If the Product specified in the contract cannot be delivered for reasons not attributable to BST Solar (e.g. manufacturer stock shortage), BST Solar may deliver a technically and qualitatively equivalent or better Product. BST Solar must inform the Customer of this within 7 days of becoming aware of it.

7. Retention of title

7.1. Title to the delivered Products remains with BST Solar until the full purchase price (all items, fees and costs) has been paid. Until full payment, the Customer may not encumber or dispose of the Product in favour of a third party, nor transfer possession of it in a way that would jeopardise BST Solar’s title.

7.2. Where the delivered Product has been built into or integrated with other equipment and cannot be removed, or only with disproportionate difficulty, BST Solar’s retention of title – until full payment of the purchase price – extends to the equipment into which the Product was incorporated; by concluding the contract, the Customer expressly and irrevocably consents to the creation of a resulting lien in favour of BST Solar.

7.3. Title to the Gateway and to any other equipment provided by BST Solar for the Remote Monitoring service always remains with BST Solar (Section 12.3).

8. Acceptance and notification of defects

8.1. The Customer must inspect the Product/Service upon receipt and notify any quantity shortfall or obvious quality defect in writing within 5 business days of receipt or handover. Failing this, performance is deemed to have been tacitly accepted.

8.2. In the case of a hidden defect, the Customer must notify the defect in writing within 5 business days of discovering it, and in any event within the statutory warranty/guarantee period, with a description of the defect and supporting documentation (photos, logs, measurement data).

8.3. Certificate of performance for services. For Services, BST Solar issues a certificate of performance (e.g. commissioning report, work sheet). If the Customer raises no reasoned objection in writing within 5 business days of receipt of the certificate, performance is deemed accepted. The Remote Monitoring service is deemed performed on a monthly basis.

9. Guarantee and warranty

9.1. Only the manufacturer’s warranty applies to the delivered Products, which BST Solar passes on to the manufacturer (warranty pass-through). BST Solar does not provide its own extended warranty unless the Parties expressly agree on it separately in writing in the Individual Contract or the Offer. For Products assembled by BST Solar and sold in the webshop (e.g. BST Control Box), BST Solar provides a 12-month guarantee from handover, subject to the exclusions in Section 9.3; the manufacturer’s warranty also applies to the built-in manufacturer components.

9.2. For its own assembly, integration or configuration work – if separately ordered – BST Solar undertakes a limited obligation to remedy defects for the period set out in the Individual Contract (failing that, 12 months) from handover, solely for documented and reproducible defects arising from its own activity.

9.3. The guarantee/remedy obligation does not cover in particular: modifications or interventions by the Customer or third parties; defects in third-party (manufacturer) hardware, firmware or software; improper use, environmental effects (overvoltage, lightning damage, moisture, mechanical damage); incorrect or incomplete data provided; or operational or energy market results after handover.

10. Business customers only; consumers

10.1. Purchasing in the webshop is available only to businesses and other organisations (B2B). BST Solar does not conclude webshop contracts with consumers (natural persons within the meaning of Section 8:1(1)(3) of the Hungarian Civil Code). When applying for customer status and when ordering, the Customer declares that it is acting within the scope of its profession, independent occupation or business activity.

10.2. A natural person may create an Account and download documentation as a Registered User (level 1), but may not apply for customer status or place orders.

10.3. As contracts are concluded between businesses, the Customer is not entitled to the 14-day right of withdrawal under Government Decree 45/2014 (II. 26.) on consumer contracts. Withdrawal from and rescission of the contract are governed by Section 4.7.

10.4. If it later turns out that the Customer falsely declared itself to be a business, BST Solar may cancel the order and refund any amount already paid.

11. Engineering services

11.1. BST Solar provides the Services to the best of its knowledge and professional experience, in line with generally accepted industry standards. Unless expressly agreed otherwise in writing, BST Solar acts on a “best efforts” basis and does not undertake any obligation of result regarding the energy market, commercial, grid or financial performance of the overall project (PV park, BESS, grid connection).

11.2. Within the scope of the Services, BST Solar typically acts as technical integrator / Owner’s Engineer. Unless expressly agreed otherwise, BST Solar is not a general designer, general contractor, EPC contractor, responsible technical manager, technical inspector, manufacturer or manufacturer’s representative.

11.3. The Parties always set out the exact scope of the Service, excluded tasks, fees and deadlines in the Individual Contract, except for the webshop services under Section 4.5. These GTC alone do not create any obligation to provide Services.

11.4. The Customer must provide BST Solar with the data, documentation, access and site conditions required for performing the Service in good time and in full. BST Solar is not liable for delays or defects resulting from incomplete, incorrect or late information.

11.5. If, before or during the contract, BST Solar prepares a payback, energy yield or other operational calculation for the Customer, the Parties regard the data in it as purely indicative estimates. BST Solar’s liability does not extend to the actual achievement of the values in the calculation (e.g. payback period, expected generation, energy market revenue), and the Customer may not claim damages from BST Solar on that basis.

12. Remote Monitoring service

12.1. Ordering. The Remote Monitoring service may only be used by Approved Customers, ordered in writing (by webshop order or Individual Contract). The service starts with the installation of the Gateway and activation of Portal access; from then on the Customer is a Monitored Customer.

12.2. Content of the service. Via the Gateway and an encrypted VPN connection, BST Solar collects the Site’s operating data (e.g. controller, inverter, PCS, BMS and meter data), displays them on the Portal, prepares statistics and reports, sends alerts (e-mail, mobile notification – once these functions are launched) and performs remote diagnostics. The service does not include site visits, repairs, spare parts or remote control (the latter is governed by Chapter 13); these are charged separately.

12.3. The Gateway. The Gateway and its SIM card are the property of BST Solar and are made available for the Customer’s use. The Customer must keep the Gateway with due care and ensure its power supply, and may not relocate, open or reconfigure it. The Customer is liable for loss of or damage to the Gateway, except for normal wear and tear. On termination of the contract, BST Solar removes the Gateway, or the Customer returns it within 15 days. If the Gateway is lost, not returned, or damaged beyond normal wear and tear, the Customer pays flat-rate compensation of HUF 100,000 + VAT per device.

12.4. Availability. BST Solar provides the service on a “best efforts” basis; unless otherwise agreed in writing, it does not guarantee availability (SLA), response time or alert time. BST Solar informs the Customer of planned maintenance in advance where possible.

12.5. Customer cooperation. The Customer provides the on-site conditions required for installing and operating the Gateway, network access to the Site’s equipment and – where the Gateway communicates via the Customer’s network (Secondary mode) – the necessary IP address, ports and firewall settings.

12.6. Data. The Site’s measurement and operating data belong to the Customer. The Customer grants BST Solar a right to use the data for providing the service, troubleshooting and security, and – in anonymised form that does not identify the Customer or the Site – for service development and statistics, also after termination of the contract.

12.7. Fee. The service is charged as a monthly fee, the amount of which is stated in the webshop, the Offer or the Individual Contract (currently HUF 29,990 net per month). The monthly fee applies per Site and per BST Control Box: where several Control Boxes operate at one Site, a separate monthly fee is payable for each Control Box. In the webshop, the Customer orders prepaid months; BST Solar invoices the fee in advance. BST Solar may change the monthly fee with effect from the start of a calendar year, giving at least 30 days’ prior notice; in that case the Customer may terminate under Section 20.3.

13. Remote control and aggregator access

13.1. Remote control of the Site’s equipment (e.g. power setpoint, charging/discharging, switching on/off) – whether by BST Solar or an Aggregator, via the Portal or VPN – is possible only on the basis of a separate written control agreement between the Parties. The Remote Monitoring service in itself does not include any right of control.

13.2. BST Solar grants aggregator access only at the Customer’s written request and only to the Aggregator named by the Customer. Deciding to whom the Customer grants control access, and the Customer’s contract with the Aggregator, are the Customer’s responsibility.

13.3. The party issuing a control command is liable for its consequences (in particular loss of generation, battery degradation, grid or balancing energy penalties). BST Solar’s liability is limited to documented defects in its own control logic (e.g. safety limits, SoC protection), subject to the limits in Chapter 15.

13.4. BST Solar may suspend or close the VPN connection, control or aggregator access immediately and without prior notice for security reasons (e.g. suspected unauthorised access, dangerous operating condition, instruction from an authority or grid operator); it informs the Customer without delay. BST Solar is not liable for any resulting damage.

13.5. Until the control function goes live, this Chapter is to be understood as informative; the detailed terms are set out in the control agreement.

14. Security rules (acceptable use)

14.1. The user of the Account must:

1. keep their password secret and choose a strong password not used for other services;
2. enable two-factor authentication (MFA) where BST Solar requires it – this is mandatory for Monitored Customers’ Accounts;
3. not share the Account with others (Section 3.5);
4. report any suspected unauthorised use of their Account or the Gateway, or any security incident, to BST Solar (sales@bst.solar) without delay and in any event within 24 hours;
5. request deletion of the Accounts of departing employees.

14.2. It is prohibited in particular to reverse-engineer, vulnerability-test or load-test the website, the webshop or the Portal without BST Solar’s prior written permission; to attempt to access other users’ or Sites’ data; to collect data automatically (scraping); or to upload malicious code.

14.3. In the event of a breach of these rules, BST Solar may act under Section 3.6 and claim compensation for its resulting damage. BST Solar logs access for security purposes (see the Privacy Notice).

15. Limitation of liability

BST Solar’s liability is strictly limited to the terms set out in the contract (Offer, Proforma Invoice, Individual Contract, webshop order) and in these GTC.

15.1. Except for damage caused intentionally, damage to human life, physical integrity or health, and liability that cannot be limited by mandatory law, BST Solar’s total aggregate liability under these GTC, the Offer, the Proforma Invoice or the Individual Contract – on whatever legal ground – may not exceed the net fee/purchase price actually paid by the Customer to BST Solar under the given transaction. For the Remote Monitoring service, the cap is the total net monthly fees actually paid in the 12 months preceding the event giving rise to the damage.

15.2. The liability cap applies separately per transaction/project. A claim arising from one transaction may not increase the liability cap of another, and the existence of several transactions does not result in joint, aggregated or unlimited liability.

15.3. BST Solar is in particular not liable for the following damage, losses, penalties or costs, even if it was warned in advance of the possibility of their occurrence:

• loss of profit, loss of revenue, loss of generation, availability losses;
• energy market losses, unfavourable market prices, incorrect schedules or dispatch decisions;
• penalties, fees, contractual penalties or costs imposed by MAVIR, the distribution system operator (DSO), aggregators, energy traders or for balancing energy;
• battery degradation, increased cycle count or loss of manufacturer warranty, unless directly caused by BST Solar’s intentional breach of contract;
• claims of third parties (in particular operators, aggregators, energy traders, grid operators, financiers, insurers);
• indirect, consequential, special or punitive damage;
• loss or unavailability of data, failure or delay of alerts, temporary unavailability of the Portal;
• failure or malfunction of the mobile network (SIM) or internet service, or of the Customer’s network;
• damage resulting from leakage of the Account password within the Customer’s organisation or from a breach of Chapter 14.

15.4. The Parties expressly agree that the above limitations and exclusions form an essential part of the contractual balance under these GTC, and that BST Solar’s fees do not include any insurance premium for, or assumption of, the energy market and operational risks of the Customer’s project.

16. Force majeure

Neither Party is liable for late or defective performance of its contractual obligations if caused by circumstances beyond its control that were unforeseeable at the time of contracting (force majeure), such as in particular natural disasters, war, epidemics, restrictions by authorities or grid operators, supply chain disruptions, major power outages or cyber attacks. The affected Party must notify the other Party of the force majeure event and its expected duration in writing without delay.

17. Intellectual property

17.1. Designs, configurations, documentation and other intellectual works delivered by BST Solar during performance remain the property of BST Solar (or of the entitled third party, e.g. the manufacturer). Upon full payment of the purchase price/fee, the Customer acquires a non-exclusive, non-transferable right of use necessary for the intended use of the Product/Service. The Customer may not copy the documentation or configuration received to a third project, resell it or pass it on to a competitor of BST Solar. Section 3.7 also applies to documents downloaded from the website; the control logic of the Portal and the BST Control Box is the intellectual property of BST Solar.

17.2. The Customer acknowledges and accepts that BST Solar may take photographs of the delivered Product and/or the installed system, which may be used as references without disclosing the Customer’s trade secrets or the exact identification of the Installation Site. BST Solar may publish these photographs on its website and other online or offline communication channels and make them available to third parties as reference material.

18. Confidentiality

The Parties must treat business, technical, financial and pricing information received from the other Party as confidential, use it solely for performing the contract and not disclose it to third parties, unless the information is publicly available or disclosure is required by law. Prices individually agreed or discounted for an Approved Customer qualify as confidential information; list prices published on the website do not.

19. Data protection

19.1. In performing the contract, the Parties process personal data in accordance with the applicable data protection laws (GDPR, Infotv.). Detailed information on BST Solar’s data processing practices is provided in the Privacy Notice available on www.bst.solar, including the processing of data relating to Accounts, orders and the Portal, and the logging of GTC acceptance.

19.2. Where, within the Remote Monitoring service, BST Solar processes personal data of the Customer’s employees or other natural persons on the Customer’s behalf (e.g. additional Portal users, alert recipients), BST Solar qualifies as a processor, and the Parties conclude a data processing annex under Article 28 GDPR, which forms part of the Remote Monitoring contract.

20. Termination of the Account and the contract

20.1. Deleting the Account. The user may request deletion of their Account at any time from the Account or by e-mail. Deletion does not affect contracts already concluded or data that must be retained by law (e.g. invoices). While a Remote Monitoring service is active, the Account can only be deleted once the service has ended.

20.2. Inactive Account. BST Solar may delete a level-1 Account with no login for 24 months, after sending an e-mail notice at least 30 days before deletion.

20.3. Terminating the Remote Monitoring service. Either Party may terminate the open-ended Remote Monitoring service in writing (including by e-mail) with 30 days’ notice. For prepaid periods, the service continues until the end of the period; BST Solar refunds the fees for unused full months only if it terminates the service itself. BST Solar may terminate with immediate effect in the event of a serious breach by the Customer (in particular payment delay exceeding 15 days or breach of Chapter 14).

20.4. Consequences of termination. On termination, BST Solar disconnects the Gateway and ends Portal access; the return of the Gateway is governed by Section 12.3. Within 30 days of termination, the Customer may request an export of the Site’s data (in a common format, e.g. CSV); after that, BST Solar deletes or anonymises the data, except where retention is required by law.

21. Subcontractors and assignment

21.1. BST Solar may engage subcontractors or agents; this does not reduce BST Solar’s liability under these GTC, provided that the exclusions and caps set out in these GTC continue to apply to such liability.

21.2. Neither Party may transfer or assign its rights or obligations under the contract to a third party without the other Party’s prior written consent.

22. Governing law and disputes

22.1. These GTC and all legal relationships established under them are governed by Hungarian law. The Parties expressly exclude the application of the United Nations Convention on Contracts for the International Sale of Goods (CISG).

22.2. The Parties will first attempt to settle disputes by negotiation. If this fails, they submit to the exclusive jurisdiction of the competent ordinary courts of Hungary.

23. Miscellaneous

23.1. If any provision of these GTC is or becomes invalid, unlawful or unenforceable, this does not affect the validity of the remaining provisions. The Parties will replace the invalid provision with a valid one that comes closest, economically and legally, to their original intention.

23.2. Amendments or supplements to an Individual Contract are valid only in writing, signed by the Parties’ duly authorised representatives.

23.3. BST Solar reserves the right to amend these GTC unilaterally. Amendments take effect upon publication on www.bst.solar and apply to Offers and Proforma Invoices issued, webshop orders placed and contracts concluded after publication; contracts already concluded are not affected.

23.4. After a new version of the GTC is published, BST Solar asks for acceptance of the new version the next time the Account is used; without acceptance, the Account can only be used for deletion under Section 20.1. BST Solar notifies material changes affecting the Remote Monitoring service by e-mail at least 30 days before they take effect. All previous versions of the GTC remain available on the website with their version number and period of validity.

23.5. BST Solar logs acceptance of statements electronically (user, document and version, timestamp, IP address); the log serves as evidence of acceptance. At registration and at checkout, BST Solar draws particular attention to the terms of these GTC that deviate from common practice (in particular Sections 3.4, 4.4, 4.7, 6.4, 12.3, 12.7, 15, 20.3 and 23.3), which the Customer expressly accepts by ticking the checkbox (Section 6:78 of the Hungarian Civil Code).

23.6. These GTC are drawn up in Hungarian and English. In the event of any discrepancy, contradiction or difference in interpretation between the two language versions, the Hungarian version prevails and is decisive.

Version: v2.0 – effective from 6 October 2026. Previous version: v1.0, effective from 13 August 2026.